Machine for dusting tin plates or other metal sheets.



H. PETIN.

MACHINE FOR DUSTING TIN PLATES 0B OTHER METAL SHEETS.

APPLIOATIOH FILED .TUNE 3, 1911.

1 ,034,830. Patented Aug. 6, 1912.

2 SHEETS-SHEET l.

H. PETIN.

MACHINE FOB. DUSTING TIN PLATES 0R OTHER METAL SHEETS.

APPLICATION FILED JUNE 3, 1911.

Patented Aug. 6, 1912.

2 SHEETS*SHEET 2.

/IVVE/VTOR h lll N 1111111 k- 444444 4 UNITED srafigns rarniwrl OFFICE.

HEc'ronrE'rIN, or Paars, FRANCE, AssIcNon 'ro socIE'rE DITE ETABLISSEMENTS J. J. cAnNAUp E'r FORGES DE BASSE-INDRE, oF PARIS, FRANCE.

MACHINE FOB DUSTING TIN PLATES 0B. OTHER METAL SHEETS.

Specication of Letters Patent.

l Application led June 8, 1911.

Patented Aug. 6, 1912. Serial No. 631,16*.

To all whom 'it may concern: l

Be it known that- I, HECTOR PETIN, a citizen of the Republic of France, residing in Paris, France, have invented certain new and useful Improvements vin Machines for Dusting Tin Plates or other MetalfSheets, of which the following is a specification.

When tin plates are submittedl to a scouring operation, by being passed `through gypsum or other scouring material, they become covered with powder, and -it is essential that before they are sold they be wiped and completely cleansed.

The machine, which constitutes this .in- Vention, has been designed for carrying out the 'cleansing operation as above referred to.

The machine comprises a number of conveying and wiping parts which operate on the metal sheets as they travel along in one horizontal plane. During the cleansing operation .the tin plates are rst of all caused to pass for a preliminary cleansing between wiping cushions arranged in the ront portion of the machine, thenfor a final cleansing they pass through successive pairs of rollers, some of which serve as conveyers others as wipers or dusters, which effect the cleansing operations.

The whole arrangement of the machine, the disposition of the wiping cushions, of the cylindrical conveyers and the final dusting members as also the manner of operating the same, will be `understood from the following description and accompanying drawing In the drawings Figure 1 is a longitudinal section of the machine; Fig. 2 is a sectional plan at the level of the horizontal line M M in Fig. 1, along which line the tin plates travel throughout the length of the machine, and Fig. 3 is a section on the line N N in Fig. 2.

The frame of the machine is constituted by two side plates A supported on pedestals; these plates carry the bearings of the spindles of a number of horizontal rollers which have various functions.

At the front end of the machine, where the tin plates to be cleaned are fed 1n, that is at the right hand in Fig. 1, two contacting conveylng rollers B B feed the plates between two wiping cushions C C; two other conveying rollersD D subsequently conduct the plates on and between two superposed cushions-C1 C1, beyond which are two other conveying rollers E E. This front part of the machine comprises the members which effect the preliminary wiplng. The rear part of the machine is for the final wiping and polishing of the plates.

The rearv part of the machine comprises a front pair of finishing dusting or wi ing rollers F F, a pair of conveying rollers G G, a second pair of wiping rollers F1 F1 and lastly a second or rear pair of convcyers G1 G1. If desired the number of couples of conveying and wiping rollers may be increased. I t

Each of the cushions C, C1 has a body portion of wood and of a suitable shape to allow of an easy entry and exit for the metal sheets; over the wood is stretched a cove ring of wool on the exterior surface of which is applied swan-skin adapted to wipe the metal. This covering wlth the swan-skin applied is indicated by a in Fig. 1, it forms an endless band which passes over a rounded piece of wood I), wooden wedges c being employed to impart any desired tension to the band a. This arrangement allows of the length of the endless band being successively usedfas the wed es can be loosened and rthe band shifted wlth res ect to the block C.

(gpposite each of the cushionsC, C1, at the end where the metal sheets enter between them, a metal guide d or d1 is fixed as it were cornerwise, by a screw or other means, to the wooden cushions. These metal guides facilitate the entry of the metal sheets between the cushions, by preventing the edges of a sheet striking directly against these cushions thereb cutting and rapidly spoiling them and y obviating the buckling of the sheets by knocking against the swan-skin. These guides, which may be of wrought or cast iron, hold the cushions fast and approach very close to theDplane tangent to the rollers B B and D The lower cushions C C1 are supported by the frame A, which for that'purpose (see Fig. 3) carries on each of its outer faces an angle piece :c through, which pass two adjusting screws y and on the screws y rests the bottom of the wooden portion of the cushion C, which bottom may be protected when necessary by a band of metal. The upper cushions repose on the lower ones by reason of their weight only. The pressure of the upper cushions on the lower may be varied by using additional weights, such as metal plates attached to the wooden parts C C1, in which case all or some of the wooden wedges c may be removed. AIn thisV way the friction exerted by the swan-skin on the metal sheets may be varied according to the thickness of the tin plates. By reason of the upper cushions resting simply on the lower cushions, it is very easy for the operator, who superintends the working of the machine, to raise these cushions, separately or together, the two upper cushions being for this purpose connected at their two ends by flat iron bands z; the two upper cushions while resting on one side on the frame can be lifted up from the other side and both the upper and lower cushions may be then struck with a brush to free them of the dust with which they are charged.

The spindles of the dusting and conveying rollers F G, F1 G1 carry toothed wheels f, g, f1 g1 over which pass two chains lz. and lc, one on one side of the machine the other on the other side; these two chains pass respectively over toothed wheels m n on the driving shaft K and also Vover the return pinions p g carried by the shaft O. The chain h which passes over wheel lmI traverses first the pinion f of a lower dusting roller, then the wheel of an upper conveying roller, it descends around pinion f1 of a lower dusting roller, rises again around the pinion of an upper conveying roller, then passes around sprocket wheel p and returns to pinion m. Chain lc starting from pinion n passes to pinion f of an upper dusting roller, descends around the pinion of a lower `conveyer, rises again around an upper dusting roller, redescends toward the pinion of a lower conveying roller then turns to pass around wheel g and returns to pinion n. From what has just been said it will be seen that the directions of the two chains and lc are crossedv with respect to onek another in passing on exterior side of the pinions which they drive, so that the rollers in the several pairs o* dusting and conveying rollers are pressed tc ward each other by the simple tension in those chains, which insures a regular feeding and a perfect wiping by the rollers of the metal sheets. The pinions mounted on the axles of the dusting rollers F F1 are of a diameter perceptibly smaller than that of the pinions mounted on the axles of the conveying rollers G G1; consequently the dusting rollers turn erceptibly quicker than the conveying rol ers, whic greatly helps the dusting process.

The conveying rollers G G, G1 G1 areV covconveyer roller D; anot er chain t1 couplesl another pinion carried on the spindle of the same lower roller Dand a pinion carried by the spindle of the front lower conveying roller B. These two chains t t1 are on the saine side of the machine. Each of them passes over a tension pulley u, the axes of which can be displaced in vertical slots so that the tensionl of the chains may be adjusted. The u per rollers B, D and E are operated simp y by friction with each o1e the respective lower rollers.

The operation of this machine is effected in the followin manner: The tin plates X that arel to be c eaned are placed first of all between the rollers B B, the then pass between the front pair of cus ions C C, the rollers D D, the second pair of cushions C1 C1 and the rollers E E; they subse uently pass between the several airs of dusting and conveyin rollers F F1 G1. These plates in passing between the cushions C C1, lose most of the powdery matter and other impurities with which they may be covered; any (powder and impurities remaining is wipe off by the dustin rollers F F1 which are as stated above preferably covered with sheep skin. These rollers complete the operation by wi ing the more or less de ressed portions on tlie surfaces of the meta sheets which depressions may have escaped the action of the cushions C C1.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

1. A machine for dusting sheets of tin plate or the like comprising a pair of dusting cushions and pairs of dusting and finishing rollers, arranged in succession, and means for feeding a plate through said rollers and between said cushions.

2. In a machine for dusting sheets of tin plate or the like, the combination of u per and lower wipin cushions arrange in front of the mac'ine, said lower cushion being adjustably supported with relation to the frame of the machine, and the u per cushion resting upon the upper side o the plate.

3. In a machine for dusting sheets of tin plate or the like, the combination of up er and lowerwiping cushions having a re atively soft covering upon their wiping faces,

and ides in advance of said cushions inclinedutoward each other to guide the plate between the cushions.

4f. In a machine for dusting sheets of tin plate or the like, the combination of a series of pairs of dustin and finishing rollers, a series of pairs o conveying rollers, the dusting and conveyin rollers bein alternative y arranged an the rollers 1n each pair movable toward one another, and chains one on each side of the machine for driving said rollers, each chain engaging successive pairs of rollers by assing over the outer side of the upper rol er in one pair and over the outer side of the lower roller in the next pair, each chain enga ng a roller in each pair op osite the rol er engaged by the chain on t e other side, whereby tension upon said chains may be transmitted vertically to said rollers.

5. A machine for dusting sheets of tin plate or the like comprising a pair of dusting cushions and pairs of dusting and finishing rollers, and pairs of feed rollers, said dusting and said feed rollers being covered with a soft material, said pairs o dusting rollers and pairs of feed ro 1ers being alternately arranged.

6. A machine for dusting sheets of tin or the like comprising a air of feed rollers B, a pair of dusting cusliions C, a air of feed rollers D, a second air of ustin cushions C1, a pair of fee rollers E, an successive alternative pairs of dustin and finishing rollers and eed rollers F, F1, G1, substantially as described.

In witness whereof, I have hereunto si'led my name in the presence of two su scribing witnesses.

HECTOR PETIN. 

